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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> Electrical >> Gauges >> Meter, Warning Lamp & Indicator (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Fuel Level Sensor Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUEL LEVEL SENSOR (SUB) CIRCUIT

    1. Turn Ignition Switch OFF.
    2. Disconnect Unified Meter And A/C Amp. connector and Fuel Level Sensor Unit (Sub) connector.
    3. Check continuity between Unified Meter And A/C Amp. Harness Connector and Fuel Level Sensor Unit (Sub) Harness Connector.
      Unified Meter A/C Amp. Fuel Level Sensor Unit (Sub) Continuity
      Connector Terminal Connector Terminal
      M67 42 B99 2 Existed
    4. Check continuity between Unified Meter And A/C Amp. Harness Connector and ground.
      Unified Meter A/C Amp. Ground Continuity
      Connector Terminal
      M67 42 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 2. 

    NO 

    Repair harness or connector.

  2. CHECK FUEL LEVEL SENSOR (MAIN-SUB) CIRCUIT

    1. Disconnect Fuel Level Sensor Unit And Fuel Pump (Main) connector.
    2. Check continuity between Fuel Level Sensor Unit (Sub) Harness Connector and Fuel Level Sensor Unit And Fuel Pump (Main) Harness Connector.
      Fuel Level Sensor Unit (Sub) Fuel Level Sensor Unit And Fuel Pump (Main) Continuity
      Connector Terminal Connector terminal
      B99 3 B98 2 Existed
    3. Check continuity between Fuel Level Sensor Unit (Sub) Harness Connector and ground.
      Fuel Level Sensor Unit (Sub) Ground Continuity
      Connector Terminal
      B99 3 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 3. 

    NO 

    Repair harness or connector.

  3. CHECK FUEL LEVEL SENSOR (MAIN) CIRCUIT

    Check continuity between Fuel Level Sensor Unit And Fuel Pump (Main) Harness Connector and Unified Meter And A/C Amp. Harness Connector.

    Fuel Level Sensor Unit And Fuel Pump (Main) Unified Meter A/C Amp. Continuity
    Connector Terminal Connector terminal
    B98 3 M67 58 Existed

    Is the inspection result normal?

    YES 

    Replace Unified Meter And A/C Amp. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair harness or connector.